keller electrical components, German keller models, keller prices

keller electrical components are specifically designed to suppress high-frequency noise and spike interference on signal and power lines, and also have the ability to absorb electrostatic pulses. Ferrite beads are used to absorb ultra-high-frequency signals. For example, some RF circuits, PLL, oscillator circuits, and circuits containing ultra-high-frequency memory (DDR SDRAM, RAMBUS, etc.) all require ferrite beads at the power input. Inductors are energy-storage components used in LC oscillator circuits, medium- and low-frequency filter circuits, etc., with an application frequency range rarely exceeding 50MHZ. Ferrite beads have high resistivity and permeability, equivalent to a resistor and inductor in series, but both resistance and inductance vary with frequency.

keller electrical component classification

There are various classification methods for thyristors: (1) Classification by turn-off, conduction, and control methods: Thyristors can be classified into conventional thyristors, triacs, reverse-conducting thyristors, gate turn-off thyristors, BTG thyristors, temperature-controlled thyristors, and light-controlled thyristors based on their turn-off, conduction, and control methods. (2) Classification by pins and polarity: Thyristors can be classified into two-pin, three-pin, and four-pin thyristors based on their pins and polarity. (3) Classification by package type: Thyristors can be classified into metal-packaged, plastic-molded, and ceramic-packaged types based on their package form. Among these, metal-packaged thyristors are further divided into bolt-type, flat-type, and round-case types; plastic-molded thyristors are divided into types with and without heat sinks. (4) Classification by current capacity: Thyristors can be classified into high-power, medium-power, and low-power types based on current capacity. Typically, high-power thyristors use metal casing, while medium- and low-power thyristors mostly use plastic molding or ceramic packaging. (5) Classification by turn-off speed: Thyristors can be classified into conventional thyristors and high-frequency (fast) thyristors based on turn-off speed. (6) Zero-crossing triggering - generally used for power regulation, i.e., triggering occurs when the phase of the sinusoidal AC voltage crosses zero; the thyristor conducts only upon zero-crossing. (7) Non-zero-crossing triggering - the thyristor can be triggered to conduct regardless of the AC voltage phase. Phase-shift triggering is common, i.e., changing the output percentage by altering the conduction angle (phase angle) of the sinusoidal AC voltage.

keller electrical component composition

A sensor generally consists of four parts: a sensing element, a conversion element, a conditioning circuit, and an auxiliary power supply. The sensing element directly senses the measured quantity and outputs a physical signal with a definite relationship to the measured quantity; the conversion element converts the physical signal from the sensing element into an electrical signal; the conditioning circuit is responsible for amplifying and modulating the electrical signal from the conversion element; the conversion element and conditioning circuit generally require power from the auxiliary power supply.

keller electrical component parameters

(1) Rated operating voltage: refers to the voltage required by the coil for normal relay operation. Depending on the relay model, it can be AC or DC voltage. (2) DC resistance: refers to the DC resistance of the relay coil, which can be measured with a multimeter. (3) Pull-in current: refers to the minimum current required for the relay to perform the pull-in action. During normal use, the supplied current must be slightly greater than the pull-in current to ensure stable relay operation. The working voltage applied to the coil should generally not exceed the rated operating voltage; otherwise, excessive current may burn out the coil. (4) Release current: refers to the maximum current at which the relay performs the release action. When the current in the pulled-in state decreases to a certain level, the relay returns to the de-energized release state; this current is much lower than the pull-in current. (5) Contact switching voltage and current: refer to the voltage and current the relay is allowed to handle. These determine the magnitude of voltage and current the relay can control. Do not exceed these values during use, as doing so can easily damage the relay contacts.

Weidou Intelligent Technology specializes in selling German keller connectors, keller switches, keller relays, keller controllers, keller plugs, keller sensors, keller resistors, keller capacitors, keller buses, keller modules, keller cables, keller power supplies, keller interfaces, keller gateways, and keller circuit breakers. All keller products are original imports from Germany. Customers are welcome to inquire and place orders.